Two teenagers attacked an MTA conductor on a Brooklyn train Monday, punching her in the face and stealing her conductor keys, police said. The boys approached the 51-year-old conductor’s cab on a Manhattan-bound F train near the 4th Ave.- 9th St. station in Park Slope around 1:15pm, cops said. They opened the door and socked the woman in the face before grabbing her keys. One of the teens was arrested on the spot. Click here to read more on nydailynews.com.